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Table Of Quarter-Squares Of All Integer Numbers Up To 100,000, By Which The Product Of Two Factors May Be Found By The Of Addition And Subtraction Alone

Samuel Linn Laundy

Multiply at a glance: addition and subtraction only. A classic tool for speed.Samuel Linn Laundy’s Table of Quarter-Squares of All Integer Numbers Up to 100,000 is a nineteenth-century mathematical reference table designed for tidy, reliable computation. By using quarter-square multiplication, the work turns products into lookups and simple additive operations, making it an int...

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